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According to an inscription running between the pulpit's arcades and parapets, it was commissioned by Canon Arnoldus (Arnoldo) and supervised by the treasurers Andrea Vitelli and Tino di Vitale. Vasari says the commission was given in 1297, and the inscription records its completion in 1301. There is no false modesty: " Giovanni carved it, who performed no empty work. The son of Nicola, and blessed with higher skill, Pisa gave him birth, endowed with mastery greater than any seen before".[2]

Giovanni was approaching the age of fifty when he began the work, and had worked on his father's projects, and possibly visited France.

The structure is similar to the pulpit in Pisa: a hexagonal plan with seven columns (one in the middle), two of which are supported by lions and one by a stooping figure of Atlas, while the central one rests on three winged gryphons and the remaining ones on plain bases. The organization of the parapet's reliefs is inspired by the pulpit in Siena.

The iconographic program is also inspired by Nicola's work, with "Allegories" in the pendentives of the arches, "Sibyls" and "Prophets standing on the capitals' tops, and the five parapets with the following scenes from the Life of Christ:

The scenes are as crowded and dramatic as those of the Sienese pulpit. Most notable is the scene of the "Massacre of the Innocents", for which it has been supposed that Giovanni took inspiration from German models, or even from the Trajan column in Rome. One of the Sibyls, portrayed in the sudden gesture of fleeing towards an angel, is also of particular distinction. For the first time Pisano tilted the reliefs, with the upper parts projecting further than the lower, to allow for the position of the viewer below.[3]